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- Bitkey (2026) vs Coldcard Mk5
Block Bitkey (2026) vs Coinkite Coldcard Mk5
What Bitkey (2026) does better (7) and where Coldcard Mk5 wins (28) — every spec side by side.
vs
3.3Security8.2
6.4Open source4.9
2.6Bitcoin features8.8
8.8Ease of use4.3
4.3Connectivity6.2
Why is Bitkey (2026) better than Coldcard Mk5?
- Open-source firmwareYes · Coldcard Mk5: No
- TouchscreenYes · Coldcard Mk5: No
- Mobile appYes · Coldcard Mk5: No
- Fingerprint unlockYes · Coldcard Mk5: No
- Colour screenYes · Coldcard Mk5: No
- Built-in batteryYes · Coldcard Mk5: No
- Warranty (months)12 vs 0
Why is Coldcard Mk5 better than Bitkey (2026)?
- Secure Element chipNo · Bitkey (2026): Yes
- Reproducible buildsNo · Bitkey (2026): Yes
- Air-gapped signingNo · Bitkey (2026): Yes
- 100% air-gappedNo · Bitkey (2026): Yes
- BIP39 passphraseNo · Bitkey (2026): Yes
- TaprootNo · Bitkey (2026): Yes
- MiniscriptNo · Bitkey (2026): Yes
- Compatible third-party wallets0 vs 14
- Weight79 g vs 30 g2.6×
- Supply-chain & tamper protectionNo · Bitkey (2026): Yes
- PIN lockNo · Bitkey (2026): Yes
- PIN entered on the deviceNo · Bitkey (2026): Yes
Specifications
Side by side
| Security | ||
| Secure Element chip | No | Yes |
| Dual Secure Elements | — | Yes |
| Air-gapped signing | No | Yes |
| 100% air-gapped | No | Yes |
| Supply-chain & tamper protection | No | Yes |
| Secure boot | Yes | Yes |
| Anti-klepto (anti-exfil) signing | No | No |
| Firmware & open source | ||
| Open-source firmware | Yes | No |
| Source code available | Yes | Yes |
| Reproducible builds | No | Yes |
| Firmware licence | MIT | MIT + anti-sell clause |
| Upgradable firmware | Yes | Yes |
| Firmware update via | NFC | USB, microSD |
| Bitcoin-only firmware / edition | Yes | Yes |
| Device lock | ||
| PIN lock | No | Yes |
| PIN entered on the device | No | Yes |
| Fingerprint unlock | Yes | No |
| Duress PIN / decoy wallet | No | Yes |
| Brick / wipe PIN | No | Yes |
| Wipe after failed attempts | No | Yes |
| Time-delayed unlock | No | Yes |
| Anti-phishing words | No | Yes |
| Keys & backup | ||
| BIP39 passphrase | No | Yes |
| Shamir backup (SLIP-39) | No | No |
| Seed XOR | No | Yes |
| BIP85 child seeds | No | Yes |
| 24-word seed | No | Yes |
| SeedQR backup | No | Yes |
| microSD backup | No | Yes |
| NFC backup card | No | No |
| User-added entropy (dice) | No | Yes |
| Stateless use (no stored keys) | No | Yes |
| Multiple seeds on one device | No | Yes |
| Bitcoin features | ||
| Multisig | Yes | Yes |
| Taproot | No | Yes |
| Miniscript | No | Yes |
| Message signing | No | Yes |
| Coin control | Yes | Yes |
| Own node connection | Yes | Yes |
| Tor support | No | Yes |
| Replace-by-fee | No | Yes |
| Silent Payments | No | No |
| Spending limits | No | Yes |
| Testnet | No | Yes |
| Supported assets | ||
| Altcoins & tokens | No | No |
| Bitcoin only | Yes | Yes |
| Connectivity | ||
| Signing connectivity | NFC | USB-C, NFC, microSD |
| USB | No | Yes |
| USB-C | Yes | Yes |
| Bluetooth | No | No |
| NFC | Yes | Yes |
| QR code camera | No | No |
| Animated QR (UR) | No | No |
| microSD signing | No | Yes |
| Screen & input | ||
| Screen | Yes | Yes |
| Screen size | — | 1.54″ |
| Screen type | OLED | OLED |
| Screen resolution | — | 128 × 64 |
| Touchscreen | Yes | No |
| Colour screen | Yes | No |
| Gorilla Glass | — | Yes |
| Controls | Touch Screen | Buttons |
| QWERTY keyboard | — | No |
| Battery & power | ||
| Built-in battery | Yes | No |
| Battery capacity | 330 mAh | — |
| Removable battery | No | — |
| Wireless charging | No | No |
| Design | ||
| Weight | 79 g | 30 g |
| Length | 66 mm | 86 mm |
| Width | 60 mm | 50 mm |
| Thickness | 13.6 mm | 7.5 mm |
| Materials | Corian and stainless steel | Plastic |
| Water / dust resistance | No | No |
| Several colours available | No | Yes |
| Warranty (months) | 12 | 0 |
| Assembled in | USA | Canada |
| DIY build possible | No | No |
| Apps | ||
| Official apps | Android, iOS | — |
| Desktop app | No | No |
| Mobile app | Yes | No |
| Works with wallet apps | — | Bitcoin Safe, Theya, Wasabi, Nunchuk, Cove, Electrum, Sparrow, Specter Desktop, Blockstream Green, BlueWallet, Bitcoin Keeper, Liana, Casa, Unchained |
| Compatible third-party wallets | 0 | 14 |
| Other features | ||
| FIDO2 / U2F security key | No | No |
| Password manager | No | Yes |
